<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
    .head{
        border: 1px solid;
        width: 100%;
        height: 50px;
    }
    .main{
        border: 1px solid;
        color: black;
        height: 100%;
    }
    .topMenu_ul{
        clear: both;
    }
    .topMenu_li{
        text-align: center;
        width: 150px;
        font:bold 12/18px 宋体;
        list-style: none;
        float: left;

    }
    a:link{
        text-decoration-line:none;
    }
    </style>
</head>
<body>
    <main class="main">
        <header class="head"> logo</header>
        <!-- <nav class="topMenu">menu</nav> -->
        <!-- <nav class="leftSide">left menu</nav> -->
        <nav class="topMenu">
            <ul class="topMenu_ul">
                <li class="topMenu_li"><nav><a href="#">首页</a></nav></li>
                <li class="topMenu_li"><nav><a href="#">写文章</a></nav></li>
                <li class="topMenu_li"><nav><a href="#">文章类型</a></nav></li>
                <li class="topMenu_li"><nav><a href="#">设置</a></nav></li>
            </ul>
        </nav>
    </main>
</body>
</html>